Cap threading machine



(No Model.) 2 Sheets-Sheet 1.

P. ELEY.

GAP THREADING MACHINE. No. 389,208. Patented Sept. 11, 1888.

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(No Model.) 2 SheetsSheet 2.

P. ELEY.

GAP THREADING MACHINE.

No. 389,208. Patented Sept. 11, 1888.

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PHILIP ELEY, OF BAYONNE, NEW JERSEY.

CAP-TH READING MACHINE.

SPECIFICATION forming part of Letters Patent No. 389,208, datedSeptember 11, 1888.

Application filed May 3,1888. Serial No. 272,645. (No model.)

To aZZ whom it may concern.-

Be it known that I, PHILIP ELEY, of Bayonne, in the county of Hudson andState of New Jersey, have invented a certain new and useful Improvementin Oap-Threading Machines,of which the followingis aspecification.

I have experimented more particularly with a view to producing nozzlesand caps for the cans used in storing and transporting kerosene andanalogous oils, the metal being ordinary annealed iron coated with tin,commonly designated tin-plate. I will describe the invention as thusapplied; but it will be understood that the invention may be used inproducing the proper screw threads on sheetmetal caps and nozzles ofdifferent sizes,using other metals, and adapted to apply to cans andanalogous vessels for other uses.

My eap-thrcading machines are adapted, like some of the stylespreviously known, to form the screwthreads on the previously stamped-upnozzle and also on the cap therefor at one and the same operation. Iemploy smalluprightrollers-teehnically chucks of hardened steel, eachhaving on its projecting upper end proper screw-threads corresponding tothose which it is desired to produce. I will show four of these smallrollers arranged equidistant around. the wheel. They are alike, and adescription of one will suffice for the whole. On the upper end of theroller or chuck the blank nozzle and cap previously matched together areapplied during a period while this roller is exposed so as to beproperly accessible for the purpose. The blanks fit loosely over thisscrew-threaded chuck before the screw-threads are formed therein, and itis further important to the success of the ejecting operation that theyshall also fit loosely after the screw-threads have been completelyformed. A large horizontal wheel mounted alongside carries a segmentwhich is properly ridged to match in the scores in this small roller andis provided with a partial flange above. The rotation of this wheelfirst presents the flange over the cap to hold it and the nozzle down inthe proper position on the small roller. Afterward the ridges on thewheel commence to act on the metal of the cap and nozzle,biting themetal between its ridged surfaces and the correspondingly screw-threaded adjacent surface of the roller, causing the cap and nozzle which arepinched between them to turn around several times. The wheel and theroller are geared together by spurgear of corresponding sizes, insuringtheir strong and uniform motion, gradually imprinting the threads bothin the nozzle and cap. Finally,the continued revolution of the rollerand wheel brings around a part of the wheel, which is so shaped as torelieve the cap from pressure; and a spring-dog, which has been properlyplaced below, by a previous operation of the machine, rises and throwsoff the completed cap and completed nozzle, both having beenscrew-threaded at once, and obviously so as to match together. The capand nozzle may be allowed to remain engaged in this condition just asthey come from the machine, and the flange of the nozzle being properlysoldered or otherwise fixed to the can, (not represented,) the can isready for delivery for use with the cap in place on the nozzle, butready to be removed any time by turning it.

In the operation of my machine in treating the blanks, as soon as onecompleted nozzle and cap has been ejected by the spring, the furtherrevolution of the wheel causes a cam projection on its under face todepress the spring-dog. Then the attendant applies the blanks foranother nozzle and cap properly matched together upon the small roller,and the round of operations is completed.

The following is a description of what I consider the best means ofcarrying out the invention.

The accompanying drawings form a part of this specification.

Figure 1 is a plan View of the apparatus, a portion being broken away.Fig. 2 is a side elevation. Fig. 3 is a plan view of certain portions.The remaining figures-Figs. 4 to 8, inclusiveare elevations showingsuccessive stages in the revolution of the main wheel.

Similar letters of reference indicate corrcsponding parts in all thefigures where they occur.

A is the fixed framework, of east-iron or other suitable material,certain parts being 2 seazoa designated, when necessary, by additionalmarks, as A. This framing may be in as many pieces as desired, rigidlybolted together.

B is an upright shaft supported in bearings in the framing A. Itreceives motion through a large bevel gear-wheel, B, from a small bevelgear-wheel, O, fixed on the drivingshaft 0, which receives motionthrough a pulley, O, actuated by a belt rotated continuously by asteam-engine or other suitable power. gear-wheel, B, and apeculiarly-formed wheel, D, to be described farther on.

E is a chuck or short upright roller, having a collar, E, and screw-threads 0 on its exposed upper end. On its lower end is formed a smallspur gear-wheel or pinion, E, which latter is engaged with thegear-wheel B, and receives a rapid rotary motion therefrom as the formeris slowly revolved.

G is a clearer-a spring-dog held on the framing A by screws 9. The wheelD is formed with a lip, D, which holds the spring-dog G depressed,except during a small portion of each revolution. On the wheel D isbolted a segment, D, the exterior of which is formed with inclinedridges d, which match to the screw-threads e on the chuck E. This ridgedsegment may also be of hardened steel. As the parts revolve, the ridgesd match successively in the grooves e in the chuck E, and give acorresponding shape to those portions of the cap and nozzle which arecaught between them. Above the segment D is a flange, D This, too,extends only partially around the wheel; but its front edge projectssomewhat in advance of the segment D.

In the operation of the machine the wheel D, during a portion of eachrevolution, first presents the flange D over chuck E, so as to hold downfirmly the nozzle and cap, which have been previously applied by theattendant upon the chuck, and next presents its ridged surface (1,matching the ridged surface a of the roller, so as to producecorresponding screwthreaded ridges in the cap and nozzle. These ridgesin the cap and nozzle are fully completed during the passage of theridged portion d. Then the rotation of the wheel removes the partialflange D and liberates the spring-dog G, which latter rises smartly byits elasticity and lifts and ejects the completed sheet-meta parts.

A hole, a, is conveniently placed to allow the completed nozzle and capstill remaining together to descend into any convenientreceptacleplacedbelowthetable,orintoaspoutleading through the floor toan apartment below. The attendant next applies a fresh blank for acapand nozzle on the chuck or roller E, and the rotation of the wheel,bringing the flange over it, holds it down, and it is in turn treatedbe; tween the ridged surfaces 01 e, and the entire round of operationsis repeated. The several chucks or screw-threads E are mounted indetachable portions A of the framing, which are On the shaft B is fixeda large spur held in placed by stout bolts a. It is important to be ableto adjust the chucksslightly toward and from the wheel D,to compensatefor different thicknesses of the metal to be treated or imperfections inthe construction or inequalities in the wear.

I are set-screws tapped through projections A in the framing and actingagainst the outer edge of each adjustable piece A. By turning any one ofthese the corresponding chuck E may be adjusted toward or from the wheelD with any required degree of nicety.

It is important to the successful working of the ejector that the blanksshall be of such size and the work so conducted that when the blankshave been completely threaded the finished nozzle and cap shall be somuch largerthan the chuck E that they may be ejected by a direct upwardmovement. In other words, the screw-threads of the nozzle and cap mustnot engage with the threads e on the chuck, so as to hold thereon andprevent the proper ejection by a direct upward movement.

Modifications may be made without departing from the principle orsacrificing the advantages of the invention. The grooved portion 11 canbe shortened or lengthened. Instead of making the part thereof which isfirst presented to the cap to merely indent a little and the succeedingportions to deepen the grooves and ridges thus produced, so as tocomplete the screw-threads by a number ofrevolutious of the nozzle andcap, the grooved portion d may beshorter,and the entire threads in thesheet metal may be produced complete at a single treatment between-thewheel D and the chuck E. Thus arranged it will be only necessary to havethe grooved part d of a little more length than one circumference of thechuck E.

I have shown the partial flange D and the segment D as both secured tothe wheel D by the same bolts. I prefer this mode of mounting; but othermeans may suffice. I have shown the segment D as held in a rabbet in theupper surface of the wheel D, so that the offset or shoulder D of thisrabbet receives the inner edge of the segment and supports it againstthe strong pressure in the radial direction experienced when the machineis at.

work on the two thicknesses of thick and hard sheet-iron. Thisconstruction affords an important advantage; but the machine may succeedwith the segment simply held by the bolts or by other convenient means.

I have shown four chucks E, requiring four attendants,and prefer suchnumber; but a less or greater number may be used. The machine willsucceed with only one roller E, and the power consumed in its workingwill be proportionately reduced and the amount of work which it iscapable of doing will be proportionately decreased.

I have shown the gear-wheel B as eight times larger than the pinion E,with which it engages. This may be varied 5 but it is essen-.

tial that it shall be in some exact proportion, as six times or seventimes, so that the ridges (I shall always match to the screw-threads einall positions of the parts.

It will be understood that, if it is for any reason preferable, I cantreat the cap without the nozzle and the nozzle without the cap. Iprefer treating both together, as shown.

The wheel D may rotate intermittently in stead of continuously, or itmay partially rotate alternately in opposite directions. I prefer a slowand moderate continuous revolution. The capacity for doing soconstitutes one of the merits of my invention.

The wheel may be made smaller, and only two chucks E or only one mayserve; or I can employ a greater number than shown. In the latter case,the wheel D being larger, there may be two of the segments D placedopposite to each other. The lateral pressure exerted by each balancesthe other.

With either construction that portion or those portions of the wheel Dwhich are not provided with the segment D serve as a recess, leaving afree space when that part of the wheel is presented to allow the blankto be applied and the completed nozzles removed.

The nozzles and caps may be other metal than tinned sheet-iron. Zinc isfrequently used. I can thread the two separately in any case, ifpreferred.

Parts of the invention can be used without the whole. I can dispensewith the partial flange D and hold each blank down upon its respectivechuck by other means, as by a plunger descending from above.

I claim as my invention 1. In a cap-threading machine, the rotatingwheel D, having asegment, D and portion d, obliquely grooved, andanother portion of the circumference relatively recessed, in combinationwith a screw-threaded chuck,E,and suitable driving-gear therefor,arranged for joint operation, substantially as herein specified.

2. In a cap-threading machine, the partial flange D, carried on thecontinuously-revolving wheel D d, and with the chuck E e, arranged forjoint operation, as herein specified.

3. In a capthreading machine, the clearer G, in combination with therevolving wheel D and the partial lip D thereon, and chuck E, the partsbeing provided with screw-th reads 0, and inclined ridges (1, matchingtherewith, arranged for joint operation, substantially as hereinspecified.

4. In a cap-threading machine having a continuously-revolving wheel, D,with a grooved segment, D", engaging with a screw-threaded roller, E,the construction of the wheel D with an offset, D, adapted to brace thesegment D against the strong inward pressure, substantially as hereinspecified.

In testimony whereof I have hereunto set my hand, at New York city, this28th day of April, 1888, in the presence oftwo subscribing witnesses.

H. A. J OHNSTONE, M. F. BOYLE.

